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// SPDX-License-Identifier: MIT
// Copyright © 2018 WireGuard LLC. All Rights Reserved.
import Foundation
import os.log
public class Logger {
static var global: Logger?
var log: OpaquePointer?
var tag: String
init(withFilePath filePath: String, withTag tag: String) {
self.tag = tag
self.log = filePath.withCString { fileC -> OpaquePointer? in
open_log(fileC)
}
if self.log == nil {
os_log("Cannot open log file for writing. Log will not be saved to file.", log: OSLog.default, type: .error)
}
}
func log(message: String) {
guard let log = log else { return }
String(format: "[%@] %@", tag, message.trimmingCharacters(in: .newlines)).withCString { messageC in
write_msg_to_log(log, messageC)
}
}
func writeLog(mergedWith otherLogFile: String, to targetFile: String) -> Bool {
guard let log = log else { return false }
guard let other = otherLogFile.withCString({ otherC -> OpaquePointer? in
return open_log(otherC)
}) else { return false }
defer { close_log(other) }
return targetFile.withCString { fileC -> Bool in
return write_logs_to_file(fileC, log, other) == 0
}
}
static func configureGlobal(withFilePath filePath: String?, withTag tag: String) {
if Logger.global != nil {
return
}
guard let filePath = filePath else {
os_log("Unable to determine log destination path. Log will not be saved to file.", log: OSLog.default, type: .error)
return
}
Logger.global = Logger(withFilePath: filePath, withTag: tag)
var appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "Unknown version"
if let appBuild = Bundle.main.infoDictionary?["CFBundleVersion"] as? String {
appVersion += " (\(appBuild))"
}
let goBackendVersion = WIREGUARD_GO_VERSION
Logger.global?.log(message: "App version: \(appVersion); Go backend version: \(goBackendVersion)")
}
}
func wg_log(_ type: OSLogType, staticMessage msg: StaticString) {
os_log(msg, log: OSLog.default, type: type)
Logger.global?.log(message: "\(msg)")
}
func wg_log(_ type: OSLogType, message msg: String) {
os_log("%{public}s", log: OSLog.default, type: type, msg)
Logger.global?.log(message: msg)
}
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